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Longitudinal frame twisting and different kind of holes in transverse frames
- Thread starter Joonatan
- Start date
Waterwitch
Senior Member
- Joined
- Oct 15, 2012
- Posts
- 182
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- Location
- North East USA
My rule of thumb for mouse holes is reality based having cut them in steel plates, I beam and angle bar ends building ship structure. We have no idea of the scale of
the OP's hypothetical design to say how big of a mouse hole.
the OP's hypothetical design to say how big of a mouse hole.
As already noted, the mouse at the base, is to allow the welder to perform a return around the web. This prevents cracking, if left as a stop/start at the end of the mouse hole.
As an extreme example, not performing returns, can lead to cracking in other locations too, like here:
In general mouse holes/cutouts are not to be greater than 50% of the web depth, it is passing through.
As for shapes and guidelines, there are many, such as:
DNV's
LRs
And you also need to be careful when creating the shape of the mouse hole and its objective, since this relates to cracking from fatigue.
Such as:
It is a very very deep rabbit hole, if you wish to go down this route.
Viz:-
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